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Table 3 Baseline demographic characteristics of the COACS population stratified by gender

From: China suboptimal health cohort study: rationale, design and baseline characteristics

Characteristics Total (n = 4313) Women (n = 2319) Men (n = 1994) P value
Age (years)* 36.9 ± 10.5 37.5 ± 10.4 36.2 ± 10.6 <0.001#
Nationality
 Han 4176 (96.8 %) 2249 (97.0 %) 1927 (96.6 %) 0.524
 Others 137 (3.2 %) 70 (3.0 %) 67 (3.4 %)
Socioeconomic statusa     
 ≤¥3000 1393 (32.8 %) 820 (35.9 %) 573 (35.9 %) <0.001#
 ¥3001–5000 2509 (59.1 %) 1316 (57.5 %) 1193 (57.5 %)
 >¥5000 343 (8.1 %) 151 (6.6 %) 192 (6.6 %)
Marital status
 Married with spouse 3778 (87.6 %) 2087 (90.0 %) 1416 (84.8 %) <0.001#
 Widowed, separated, or divorced 69 (1.6 %) 47 (2.0 %) 18 (1.1 %)
 Never married 466 (10.8 %) 185 (8.0 %) 277 (14.1 %)
Highest education completed
 Illiteracy or compulsory education 431 (10.0 %) 255 (11.0 %) 176 (8.8 %) <0.001#
 High school 823 (19.1 %) 510 (22.0 %) 313 (15.7 %)
 College school or higher 3059 (70.9 %) 1554 (67.0 %) 1505 (75.5 %)
Smoking history
 Never 3247 (75.3 %) 2291 (98.8 %) 956 (47.9 %) <0.001#
 Current 976 (22.6 %) 28 (1.2 %) 948 (47.5 %)
 Former 90 (2.1 %) 0 (0.0 %) 90 (4.5 %)
Drinking history
 Never 3024 (70.2 %) 2203 (95.1 %) 821 (41.2 %) <0.001#
 Moderate 762 (17.7 %) 60 (2.6 %) 702 (35.2 %)
 Heavy 524 (12.2 %) 54 (2.3 %) 470 (23.6 %)
Body mass index (kg/m2)b
 <18.5 124 (3.1 %) 101 (4.6 %) 23 (1.3 %) <0.001#
 18.5–23.9 2284 (57.1 %) 1484 (67.9 %) 800 (44.1 %)
 24.0–27.9 1244 (31.1 %) 485 (22.2 %) 759 (41.8 %)
 >28.0 349 (8.7 %) 115 (5.3 %) 234 (12.9 %)
Physical activity
 Inactive 1430 (34.1 %) 848 (37.5 %) 582 (30.1 %) <0.001#
 Moderately 655 (15.6 %) 383 (16.9 %) 272 (14.0 %)
 Very active 2114 (50.3 %) 1032 (45.6 %) 1082 (55.9 %)
Salt intake
 Low 891 (20.7 %) 5794 (25.0 %) 312 (15.6 %) <0.001#
 Medium 2268 (52.6 %) 1243 (53.6 %) 1025 (51.4 %)
 High 1154 (26.8 %) 497 (21.4 %) 657 (32.9 %)
Blood Pressure (mmHg)
 Systolic blood pressure* 116.9 ± 10.8 114.1 ± 10.9 120.1 ± 9.7 <0.001#
 Diastolic blood pressure* 74.5 ± 8.2 72.1 ± 8.2 77.2 ± 7.3 <0.001#
Fasting blood glucose (mmol/L)* 4.93 ± 0.45 4.88 ± 0.43 4.99 ± 0.46 <0.001#
Total cholesterol (mmol/L)* 4.26 ± 0.82 4.22 ± 0.82 4.31 ± 0.82 <0.001#
Triglycerides (mmol/L)* 1.32 ± 1.02 1.09 ± 0.66 1.59 ± 1.26 <0.001#
Suboptimal health status
 SHS (SHSQ score ≥35) 389 (9.0 %) 246 (10.6 %) 143 (7.2 %) <0.001#
 Ideal health (SHSQ score < 35) 3924 (91.0 %) 2073 (89.4 %) 1851 (92.8 %)
  1. Continuous variables were represented as mean ± standard deviation, or median ± interquartile range, while discrete variables were represented as number (proportion)
  2. a80 subjects provided missing data in variable of ‘Socioeconomic status’
  3. b282 subjects provided missing data in variable of ‘Body Mass Index’
  4. * Mean ± standard deviation
  5. #  P < 0.05